package 牛客.笔试.快手.集合划分问题;

import java.util.Arrays;
import java.util.Scanner;

public class Main {
    public static void main(String[] args){
       int temp = 0;
       for(int i=1;i<5;i++){
           for(int j=0;j<i;j++){
               temp++;
           }
       }
        System.out.println(temp);
    }
    public static int JumpFloor(int target) {
        if (target ==1) return 1;
        if (target ==2 )return 2;
        return  JumpFloor( target-1)+JumpFloor(target-2);
    }

}
